Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Device-free localization (DFL) localizes the target by employing the variation of received signal strength (RSS) due to the presence of the target which wears no device. The existing fingerprint-based DFL (FDFL) method simply compares the online RSS variations with the radio map and does not care about how RSS variation is caused. However, we have found that when some links are shadowed by the target,...
This paper presents a SoC (System on Chip) dedicated for human alimentary canal pH and temperature monitoring. Sensor interfaces, wireless transceiver, digital logic and power management circuits are all embedded in this SoC. The SoC was fabricated in 0.18μm standard CMOS technology and the area is about 9mm2. The SoC takes 6.15mW power at the data collection and transmission mode. The measurement...
Shadowing fading is generally considered to be detrimental to node localization based on received signal strength (RSS). However, in this paper, we propose a new localization method which exploits shadowing fading to localize the node with unknown position. As we know that when a link comprised of the unknown node and an anchor node is blocked by an obstruction, the RSS of the link will be greatly...
Under the high mobility scenario, some factors have a strong influence on LTE system performance such as the velocity of mobile user, pilot patterns, multiple-input-multiple-output (MIMO) transmission strategies, wireless channel characteristics, etc. The doppler shift or spread due to the user velocity will not only cause the inter-carrier-interference (ICI) for orthogonal frequency division multiplexing...
This paper investigates the resource allocation schemes for Voice over Internet Protocol (VoIP) traffic under high speed train scenario, in which 2-state VoIP traffic model based on Markov chain is considered. Unlike the full-buffer traffic, in which the transmitter buffer is always full of data to be transmitted, VoIP traffic can be characterized by small packets in regular intervals with tight delay...
This paper presents a smart capsule for in body pH and temperature continuous monitoring in non-invasive gastrointestinal examination. The capsule offers 24-hour continuous monitoring with less discomfort compared with conventional diagnosis. The whole system consists of a smart capsule for pH value and temperature sensing, and a portable data logger. The sensing part of the smart capsule includes...
This paper presents a capacity enhancement algorithm by using cooperative transmission in distributed antenna system (DAS) under line-of-sight (LOS) multiple-input-multiple-output (MIMO) channels in high speed train scenario. In this algorithm, the Base Band Unit (BBU) of the DAS selects multiple Remote Antenna Units (RAU) according to the large-scale fading parameters, and cooperative transmission...
This paper investigates the possible effect of "special nodes" in ad-hoc communication network topology on self-organized criticality. Due to increasing demand for ubiquitous connectivity without fixed infrastructures, recently, some approaches let ad-hoc communication networks having small- world property through the introduction of "special nodes". However, these "special...
Concept of small-world is applied in the context of wireless multi-hop networks in this paper. We build a network model by selecting a small part of nodes and magnifying their communication distance. It is proved that this model behaves small-world character, mainly in average path length and clustering coefficient. Based on this model we put forward an uneven probabilistic flooding algorithm. Simulation...
We present improved SNR-based packet scheduling (I-SPS) algorithm as an extension of SPS algorithm. In I-SPS, the connection with better channel condition will be assigned higher weight in scheduling and the connection suffered burst error will be compensated by increasing its weight after its channel condition becomes good. Theoretical analysis and simulation results demonstrate that I-SPS algorithm...
We make some modifications in this paper to the DAP-NAD-CJ (deterministic adaptable priority net access delay with cycle jump) algorithm for multicast applications. The new algorithm assigns wireless channel access slot unevenly between stations in the network so that the multicast source can access channel as fast as possible. We then proved by calculations and simulations that the modified algorithm...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.